Band resaw



May 22, 1934. E. w. HUTCHINGS BAND RESAW Filed Jan. 24, 1933 2Sheets-Sheet l .17 1L fiul cizz'zajdf sum May 22, 1934. E. w. HUTCHINGSBAND RESAW Filed Jan. 24, 1933 2 Sheets-Sheet 2 13'- JM a aicfign s.

Patented May 22, 1934 UNITED STATES, PATENT OFFICE.

BAND RESAW Edward W. Hutchings, Perry, Fla. 4 Application. January 24,1933,. Serial No. 653,306

4' Claims.

This invention relates to band resaws, and more particularlytoattachments for the. same; and has for an; object. to provide novelguides for directing boards; abutting. each other, ac-

curately to and past the saw: in a continuous stream. to. simultaneouslyproduce two machine rived shingles of' the type described in. my pendingapplication filed September- 21, 1932, Serial Number: 634,228..

10 A further object is to providenovel' guide. plates that may beadjusted toward. or from the feed rolls: to accommodate various widthsof shingles to be. sawed'.. w

A further: object is to provide novel. brackets which perform the. dualfunction of securing the the guide plates to the vertical stationaryposts located between the feed rolls, and disposing. the workingzfaces.of-the guide plates in alinement with the work engaging surfaces of thefeed rolls; Y

A further object is to produce novel guide ribs on the guide plates andalso on said posts for accurately directing the. boards through the. sawwith minimum friction.

A- further object isto' provide attachments of the class describedwhich: will be strong and durable, will not easily get out of order, andwhich will be inexpensive to manufacture.

With the above and: other objects in view the invention consists incertain novel details of construction and combinations of partsillustrated in the accompanying drawings: and hereinafter fullydescribed and claimed;

In the accompanying drawings forming'part of this specification,

Figure 1 is a front elevation of a conventional vertical resaw equippedwith my improved guides,

Figure 2 is a longitudinal section of the vertical resaw taken on theline 2-2' of Figure 1, showing the guides in side elevation,

Figure 3 is a horizontal section through the vertical resaw taken on theline 3-3 of Figure 2', showing the guides partly inplan,

Figure 4 is a detail perspective view showing one of the guide plates,the attaching brackets and the ribs on. both the guide plate and thepost, and

Figure 5 is a perspective view of a board sawed toproduce two shingles.

Referring now to the drawings in which like characters of referencedesignate similar parts in the various views, a conventional verticalresaw is shown by way of example, although a horizontal resaw may besubstituted if desired.

The resaw comprises a bed or frame on which a table 11 is supported bymeans of a pivot 12;. whiclris mounted in bearings'13' on the underneathface of the table and in a bearing. 14 integral. with the frame, asshownbest in Figure 2; The. table is tilted on the pivot by ed means ofa feedscrew 15 and a, hand wheel 16, aSJShOWIr. best invFigure 1. Feedrolls; I'lare mounted on the tableand whenrthe table is tilted the feed.rolls are canted as aunit to advance. the material: atv anoblique angleto the vertical plane of the saw. 7

The feed rolls are power driven to rotate in the direction of the arrowheads shown in Figure. 3 by means-of gear trains 18, common to each:pair of feed rolls onthe same side of the 74p longitudinal center lineof the resaw. Each pair of feed rolls is mounted on a slide 19 which ismoved: transversely of the table 11 by means of a hand wheel 20 andfeedscrew21, as shown in. Figure 3. The axles 22 of each pair of feed75, rolls are journalled. at the top in a block 23 which is supported bya rigid post 24 which is fixed upon the slide and' risesbetween. thefeed rolls, as best shown in Figures 2 and 3.. r

The band saw 25 is. disposed beyond the feed rolls, as shown bestinwFigures. 1 and. 3,. and the. working. reach of the saw extendsthrough the frame. in a vertical. plane, as best. shown. in Figure 1.

The features, above described, are common. to all resaws. -Whethervertical or horizontal all have. feed rolls mountedron a tiltablesupport, and movable laterally towardjand away from each other. Thetilting feature positions the rolls, to feed material at an. angle tothe plane of the saw while the transversely adjustable feature permitsof. the rolls being moved closer together orfurther. apartto receivevarious thicknesses of material.

For resawing boards 28 on the vertical resaw just described by way ofexample, to produce a pair of tapered rived shingles from each board, inaccordance with the process described in my copending application,heretofore mentioned, it isdesirable that'the board's be caused totravel in a continuous uninterrupted stream to and past the saw'25'. Itis essential that, while traveling in a continuous uninterrupted streamand while passing the saw, the boards be supported accurately andfirmlyin order to prevent-jumping up of the boards-or other displacement suchas would cause damage or would produce other than a smooth even out.

To attain the above end, I dispose above the frame, and laterally of thesaw 25, a pair of upright plates 26, one of which is shown in Figure 4.These plates are formed preferably of sheet metal of sufiicient rigidityto resist vibration. The plates are of sufiicient width and height toreceive the largest sizes of boards from which shingles are to be made.

The inner face of each plate is provided with a plurality oftransversely disposed ribs 27 which are preferably alsofformed of metaland are spaced substantially equidistant apart from near the top edge tonear the bottom edge of the plate. Preferably the ends of each ribproject beyond the front and rear edges of the plate. These ribs may besecured by rivets, spot welding, or other method of fastening, andpreferably are substantially square in cross section. The ribs engagethe finished side face of the board 28 while it is passing the saw andoffer minimum obstruction by friction to the passage of the boards pastthe saw under impulse of the feed rolls.

Each plate is equipped with a pair of superposed Z-bars 29, best shownin Figure 4, which are of sufficient length to pass around the foremostfeed roll and be terminally secured by lag screws 30, or otherwise, tothe outer vertical edge of the post 24,- as best shown in Figure 3. EachZ-bar preferably is provided with a pair of slots 31 which are disposedin alinement and receive bolts 32 carried by the plate. Wing nuts 33 arethreaded on to the bolts and advanced up tight against the bar to holdthe plate 26 in each adjusted position. By loosening the wing nuts theplate may be moved on the bars toward or away from the feed rolls toaccommodate various widths of boards corresponding to the width ofshingle to be produced.

It will be particularly pointed out that the intermediate portion 29 ofeach Z-bar, between the offset end portions of the bar, is of sunicientlength'to dispose the working faces of the ribs 27 in the plane of thework-engaging surfaces of the pair of feed rolls 1'? on the same side ofthe longitudinal center line of the resaw as the Z-bar. The purpose ofthis is to maintain the ribs in alinement with the points of contactbetween the boards and the feed rolls and thus promote the unobstructedeasy travel of the boards past the saw.

In further carrying out the invention, as will be seen by referring toFigure 4, I dispose a plurality of transversely disposed parallel guideribs 34 on the inner edge of the post 24 and preferably these ribs aredisposed out of alinement with the ribs 27 on the corresponding guideplate 26 and in alinement with the spaces between the last named ribs.Screws 35 or other suitable connectors may be employed to secure theribs to the inner edge of the post 24. The ribs 34 are of suchlengththat the ends of the ribs project beyond the post so that the ribsbridge the space between the feed rolls 1'7, as shown in Figure 3. Thetips 36 of the ribs are beveled to conform to the contour of the feedrolls. The ribs 34 are preferably square in cross section and are ofsufficient thickness to permit of their working faces touching orextending in the plane of the inner faces of the ribs 27 carried by thecorresponding plate 26, and also in the plane of the work-engagingsurfaces of the feed rolls 1'7, as shown best in Figure 3.

It is desirable in practice that a pair of guide plates 37 be disposedon the table 11 to guide the boards to the feed rolls and these guideplates may simply be formed of wood and secured by screws 38, orotherwise, to the table.

In operation, boards 28 having their grain entirely longitudinally ofthe board, and dressed on both sides, are cut to lengths of 14" to 30"and from 4" to 12 wide, according to the length of shingle to bemanufactured. These boards are pushed along the table in uprightposition, abutting each other at their long edges, between the guideplates 37, and are directed by the plates to the feed rolls 17, Which,as above stated, are power driven and serve to feed the boards in acontinuous uninterrupted stream forward past the saw. The table 11,having been previously tilted and set to the desired angle with respectto the vertical plane of the saw, an oblique cut 39 will be produced, asshown best in Figure 5, and

two shingles 40 and 41 of substantially identical taper will besimultaneously sawed from a single board. These shingles will exhibitlongitudinal saw markson the sawed face parallel with'the grain to formdrip channels, as described in the above mentioned pending application.

The guide ribs 34 on both posts 24 and the guide ribs 27 on both plates26 engage the dressed side faces of the boards'while the boards aresupported at the bottom edge by the frame during passage to and by thesaw, as shown in Figures 2 and 3. The boards are thus supported firmlyand steady by the ribs and the frame so thatan accurate clean cut willbe assured. The ribs offer sufiicient friction tothe passage of theboards to prevent the same jumping up or wobbling but at the same timedo not exert sufficient friction to retard travel of the boards underimpulse of the feed rolls. r

While I have described the invention as includ ing bars 29 secured torigid posts 24 carried by the table, it is conceivable thatwherehousings are provided on the table for the feed rolls that theplates 26 may be secured to such housings in any suitable manner and itis intended to include such modificationas are within the spirit of theinvention, it merely being essential to the practice of the inventionthat the plates 26 be disposedat op posite sides of the saw and somounted on the frame as to present their working faces in alinement withthe work-engaging surfaces of the feed rolls andto be also so mounted asto be capable of being canted at an oblique angle with respect to theplane of the saw.

From the above description it is thought that the construction andoperation of my invention will be fully understood without furtherexplanation.

What is claimed is: g

1. In a resaw, a band saw, a pivoted table, feed rolls on the table,posts fixed upon the table, guide plates disposed at opposite sides ofthe saw beyond the table, and brackets secured to the posts and passingaround the feed rollers and supporting the guide plates at their freeends in alinement with the work-engaging surfaces of the feed rolls.

2. In a resaw, a band saw, a pivoted table, feed rolls on the table,posts fixed upon the table between the feed rolls, guide plates disposedat opposite sides of the saw in alinement with the workengaging surfacesof the rolls, brackets secured to the posts, and means adjustablysecuring the guide plates to the free ends of the brackets for movementtoward and from the feed rolls.

3. In a resaw, a band saw, a pivoted table, feed rolls on'the table,posts fixed upon the table, transverse guide ribs on the inner faces ofthe ends to the posts and projecting forwardly beyond the feed rolls,and guide plates carried by the free ends of the brackets and disposedat opposite sides of the saw, the intermediate portions of the bracketspassing across the foremost feed rolls and disposing the guide plates inaline ment with the work-engaging surfaces of the feed rolls.

EDWARD W. HUTCHINGS. [L.S.

